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A000765 as a simple table

na(n)
01
14
236
3308
42764
525404
6237164
72237948
821286548
9203701772
101958748676
1118908954324
12183135542956
131778581016076
1417314029758828
15168891863875652

[1,4,36,308,2764,25404,237164,2237948,21286548,
 203701772,1958748676,18908954324,183135542956,
 1778581016076,17314029758828,168891863875652]